$thumbsDesignPath = "trabalhos/design/thumbs";
$imagesDesignPath = "trabalhos/design/large";
$file_display = array('jpg', 'jpeg', 'png', 'gif');

if (file_exists($thumbsDesignPath) == false){
    echo 'Directory \'', $thumbsDesignPath, '\' not found.';
} else {
    if (file_exists($imagesDesignPath) == false){
    echo 'Directory \'', $imagesDesignPath, '\' not found.';
    } else {
        $thumbs_content = scandir($thumbsDesignPath);
        $images_content = scandir($imagesDesignPath);
        $design_content = $thumbs_content + $images_content;
        $counter = 0;
        $filesPerPage = 6;
                foreach ($design_content as $design_file)
                {
                $design_file_type = (end(explode('.', $design_file)));
                    if($design_file !== '.' && $design_file !== '..' && in_array($design_file_type, $file_display) == true){
                                if($counter == 0)
                                    echo "<li>";
                                    $counter++;
                                    /*$info = pathinfo($file);
                                    $sFile =  basename($file,'.'.$info['extension']);

                                    $aFiles = glob($images.$sFile."[0-9]+.[".implode($file_display,"|")."]"); //This array shows all images relative to the thumbnail that you are seeing*/
                                    echo '<div class="portfolio_pic_hold"> <a href="'.$imagesDesignPath. '/' .$design_file.'" rel="lightbox[Design]"> <img src="'.$thumbsDesignPath. '/'.$design_file. '" /> </a> </div>';

                                    if($counter == $filesPerPage){
                                    echo "</li>";
                                    }
                        }
                }
        }

    }